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Intramuscular fat content in the longissimus dorsi muscle and in the biceps femoris, in the meat-fat and meat pigs and in their crossbreeds



Intramuscular fat content in the longissimus dorsi muscle and in the biceps femoris, in the meat-fat and meat pigs and in their crossbreeds



Rocz Nauk Rolniczych Ser B Zootechniczna 79(2): 229-238



Intramuscular fat content was estimated in swine of 2, 4, 6 and about 9 months representing breeding groups: I-Pulawska, n-Large White, Ill-hybrids of Pulawska sows, IV-hybrids of Large White sows. 32 animals (8 from each of the 4 groups) were used in every group. Average weights at slaughter were: 15,4; 38,7; 63,9; 119,8 kg. Intramuscular fat content was estimated according to the modified Gerber's method adapted to estimation of fat in meat. Estimations were made on muscle slides of the longissimus dorsi muscle taken from the last 3 dorsal vertebrae, and from the biceps femoris, and from the middle of the muscle head. Breed differences in intramuscular fat content of the longissimus dorsi muscle were small and not significant. Intramuscular fat content was much higher in the biceps femoris than in the longissimus dorsi muscle, and the differences between Pulawska and Large White as well as their crossbreeds were significant. Correlation coefficients between intramuscular fat content in the longissimus dorsi muscle and dissection fat content in primal cuts or subcutaneous fat content in ham were small and not significant. Also, correlation coefficients between intramuscular fat content in the biceps femoris and dissection fat content in primal cuts, or subcutaneous fat content in ham were not significant.

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